In this paper, a cost-effective single-phase bidirectional active-filter-integrated AC/DC converter is proposed. It provides simultaneous functions of power factor correction (PFC), DC voltage regulation and active power decoupling for mitigating the low-frequency DC voltage ripple, without an electrolytic capacitor and extra power switches. Such a converter is readily available from a conventional H-bridge converter with minor hardware modification. Detailed principles of operation, controller design of the converter are provided in the paper. The feasibility of the converter is then confirmed experimentally through a 210 W rectification system. A stable DC output with merely 1.9% ripple is realized with two 50 μF film capacitors. In contrast, for the same ripple performance, a 514 μF capacitor is required in conventional converters without an active filter. Additionally, the uncompromised or even improved efficiency performance is another unique feature of the proposed converter.

In this paper, a cost-effective single-phase bidirectional active-filter-integrated AC/DC converter is proposed. It provides simultaneous functions of power factor correction (PFC), DC voltage regulation and active power decoupling for mitigating the low-frequency DC voltage ripple, without an electrolytic capacitor and extra power switches. Such a converter is readily available from a conventional H-bridge converter with minor hardware modification. Detailed principles of operation, controller design of the converter are provided in the paper. The feasibility of the converter is then confirmed experimentally through a 210 W rectification system. A stable DC output with merely 1.9% ripple is realized with two 50 μF film capacitors. In contrast, for the same ripple performance, a 514 μF capacitor is required in conventional converters without an active filter. Additionally, the uncompromised or even improved efficiency performance is another unique feature of the proposed converter.

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eng

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IEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1002943